为UITableView自定义详细信息披露buttonconfiguration操作
我有一个UIViewController里面的UITableView。 在我的tableView(_:cellForRowAt: ：，我configuration了一个自定义的detailDisclosurebutton的单元格，如下所示：
cell.accessoryType = .detailDisclosureButton
我也实现了tableView(_:accessoryButtonTappedForRowWith:) 。 使用“工厂” detailDisclosureButton完美工作。 我不在乎这个图标，所以我试图改变它。
设置完cell.accessoryType之后，我添加了下面的代码：
// declare the button let customDetailDisclosureButton = UIButton.init(type: .detailDisclosure) // set the image for .normal and .selected customDetailDisclosureButton.setImage(UIImage(named: "info")?.withRenderingMode(.alwaysTemplate), for: .normal) customDetailDisclosureButton.setImage(UIImage(named: "info")?.withRenderingMode(.alwaysTemplate), for: .selected) // add a target action customDetailDisclosureButton.addTarget(self, action: #selector(tableView(_:accessoryButtonTappedForRowWith:)), for: .touchUpInside) cell.accessoryView = customDetailDisclosureButton
当我加载tableView ，它显示正常。 当我点击detailDisclosureButton，它崩溃。 我究竟做错了什么？
这里是控制台输出：
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UITouchesEvent length]: unrecognized selector sent to instance 0x6180000f1000' *** First throw call stack: ( 0 CoreFoundation 0x0000000102e9ab0b __exceptionPreprocess + 171 1 libobjc.A.dylib 0x00000001024ea141 objc_exception_throw + 48 2 CoreFoundation 0x0000000102f0a134 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132 3 CoreFoundation 0x0000000102e21840 ___forwarding___ + 1024 4 CoreFoundation 0x0000000102e213b8 _CF_forwarding_prep_0 + 120 5 libswiftFoundation.dylib 0x000000010425c1a0 _TTSf4g_d___TFV10Foundation9IndexPathCfT11nsIndexPathCSo11NSIndexPath_S0_ + 32 6 libswiftFoundation.dylib 0x0000000104210a57 _TZFV10Foundation9IndexPath36_unconditionallyBridgeFromObjectiveCfGSqCSo11NSIndexPath_S0_ + 23 7 MyApp 0x0000000101e43ae7 _TToFC10MyApp22PlaylistViewController9tableViewfTCSo11UITableView31accessoryButtonTappedForRowWithV10Foundation9IndexPath_T_ + 71 8 UIKit 0x0000000104f17d22 -[UIApplication sendAction:to:from:forEvent:] + 83 9 UIKit 0x000000010509c25c -[UIControl sendAction:to:forEvent:] + 67 10 UIKit 0x000000010509c577 -[UIControl _sendActionsForEvents:withEvent:] + 450 11 UIKit 0x000000010509b4b2 -[UIControl touchesEnded:withEvent:] + 618 12 UIKit 0x0000000105440ea9 _UIGestureEnvironmentSortAndSendDelayedTouches + 5553 13 UIKit 0x000000010543bec0 _UIGestureEnvironmentUpdate + 1409 14 UIKit 0x000000010543b8f3 -[UIGestureEnvironment _deliverEvent:toGestureRecognizers:usingBlock:] + 484 15 UIKit 0x000000010543aaba -[UIGestureEnvironment _updateGesturesForEvent:window:] + 274 16 UIKit 0x0000000104f86b9a -[UIWindow sendEvent:] + 4092 17 UIKit 0x0000000104f337b0 -[UIApplication sendEvent:] + 352 18 UIKit 0x0000000105716adc __dispatchPreprocessedEventFromEventQueue + 2926 19 UIKit 0x000000010570ea3a __handleEventQueue + 1122 20 CoreFoundation 0x0000000102e40c01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 21 CoreFoundation 0x0000000102e260cf __CFRunLoopDoSources0 + 527 22 CoreFoundation 0x0000000102e255ff __CFRunLoopRun + 911 23 CoreFoundation 0x0000000102e25016 CFRunLoopRunSpecific + 406 24 GraphicsServices 0x0000000108d83a24 GSEventRunModal + 62 25 UIKit 0x0000000104f160d4 UIApplicationMain + 159 26 MyApp 0x0000000101e4df47 main + 55 27 libdyld.dylib 0x0000000104dfa65d start + 1 28 ??? 0x0000000000000001 0x0 + 1 ) libc++abi.dylib: terminating with uncaught exception of
更换
// add a target action customDetailDisclosureButton.addTarget(self, action: #selector(tableView(_:accessoryButtonTappedForRowWith:)), for: .touchUpInside)
同
customDetailDisclosureButton.addTarget(self, action: #selector(ViewController.accessoryButtonTapped(sender:)), for: .touchUpInside)
接着
func accessoryButtonTapped(sender : UIButton){ let buttonPosition: CGPoint = (sender as! UIButton).convert(.zero, to: tableView) let indexPath = tableView.indexPathForRow(at: buttonPosition) // do what you gotta do with the indexPath }
尝试使用委托方法而不是select器方法：
func tableView(_ tableView: UITableView, accessoryButtonTappedForRowWith indexPath: IndexPath) { // do you work }
要么
添加视图和它的select器方法如下：
let button = UIButton(type: .custom) button.addTarget(self, action: #selector(HomeViewController.checkButtonTapped(_:event:)), for: .touchUpInside) cell?.accessoryView = button
select
func checkButtonTapped(_ sender: Any, event: Any) { let touches: Set<AnyHashable>? = (event as AnyObject).allTouches let touch: UITouch? = touches?.first as! UITouch? let currentTouchPosition: CGPoint? = touch?.location(in: tblViewHome) let indexPath: IndexPath? = youtTblView?.indexPathForRow(at: currentTouchPosition!) if indexPath != nil { tableView(youtTblView!, accessoryButtonTappedForRowWith: indexPath!) } }